you should use a deck that 'calls to you' in a way. meaning the artwork is appealing, they feel nice when you hold them, it has a theme you like. also, try to find one that comes with a book. some feel a book is a bad thing and you should discover the meaning for each card yourself, but a book can help you with a basic meaning behind each one. i still feel you should take each card and meditate with it, to try and 'feel' what it means.
i find this site very helpful to learn and whenever i get stuck in a reading.